1. Episode 1

6.8

. 15 December 2022. 47 min

Detective Inspector Brent Hyatt and Detective Sergeant Chris Hoar are summoned to University College Hospital in London to interview a patient with an extraordinary story to tell.

2. Episode 2

6.3

. 15 December 2022. 46 min

Radiation teams swarm across London in a rush to secure potentially contaminated sites visited by the Russian spy.

3. Episode 3

6.7

. 15 December 2022. 46 min

A team of detectives led by Timmons’ ‘best man’ Brian Tarpey arrive in Moscow hoping to interview Lugovoy and Kovtun, now the prime suspects behind Litvinenko’s murder.

4. Episode 4

5.7

. 15 December 2022. 46 min

With their investigation complete, Timmons’ team submit their file to the Crown Prosecution Service, who bring charges for Litvinenko’s murder.